428914691586 has 20 divisors (see below), whose sum is σ = 961086624102. Its totient is φ = 142971563808.

The previous prime is 428914691509. The next prime is 428914691587. The reversal of 428914691586 is 685196419824.

428914691586 is a `hidden beast` number, since 4 + 2 + 8 + 9 + 1 + 46 + 9 + 1 + 586 = 666.

It can be written as a sum of positive squares in only one way, i.e., 363771828225 + 65142863361 = 603135^2 + 255231^2 .

It is not an unprimeable number, because it can be changed into a prime (428914691587) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1323810615 + ... + 1323810938.

Almost surely, 2^428914691586 is an apocalyptic number.

428914691586 is an abundant number, since it is smaller than the sum of its proper divisors (532171932516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428914691586 is a wasteful number, since it uses less digits than its factorization.

428914691586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2647621567 (or 2647621558 counting only the distinct ones).

The product of its digits is 29859840, while the sum is 63.

The spelling of 428914691586 in words is "four hundred twenty-eight billion, nine hundred fourteen million, six hundred ninety-one thousand, five hundred eighty-six".